📌  相关文章
📜  C库-

📅  最后修改于: 2020-12-19 05:38:07             🧑  作者: Mango

locale.h标头定义了位置特定的设置，例如日期格式和货币符号。您将找到几个定义的宏，以及一个重要的结构struct lconv和下面列出的两个重要函数。

图书馆巨集

以下是标头中定义的宏，这些宏将在下面列出的两个函数中使用-

Sr.No. Macro & Description
1

LC_ALL

Sets everything.
2

LC_COLLATE

Affects strcoll and strxfrm functions.
3

LC_CTYPE

Affects all character functions.
4

LC_MONETARY

Affects the monetary information provided by localeconv function.
5

LC_NUMERIC

Affects decimal-point formatting and the information provided by localeconv function.
6

LC_TIME

Affects the strftime function.

库功能

以下是在标题locale.h中定义的函数-

Sr.No. Function & Description
1 char *setlocale(int category, const char *locale)

Sets or reads location dependent information.
2 struct lconv *localeconv(void)

Sets or reads location dependent information.

图书馆结构

typedef struct {
   char *decimal_point;
   char *thousands_sep;
   char *grouping;    
   char *int_curr_symbol;
   char *currency_symbol;
   char *mon_decimal_point;
   char *mon_thousands_sep;
   char *mon_grouping;
   char *positive_sign;
   char *negative_sign;
   char int_frac_digits;
   char frac_digits;
   char p_cs_precedes;
   char p_sep_by_space;
   char n_cs_precedes;
   char n_sep_by_space;
   char p_sign_posn;
   char n_sign_posn;
} lconv

以下是每个字段的描述-

Sr.No. Field & Description
1

decimal_point

Decimal point character used for non-monetary values.
2

thousands_sep

Thousands place separator character used for non-monetary values.
3

grouping

A string that indicates the size of each group of digits in non-monetary quantities. Each character represents an integer value, which designates the number of digits in the current group. A value of 0 means that the previous value is to be used for the rest of the groups.
4

int_curr_symbol

It is a string of the international currency symbols used. The first three characters are those specified by ISO 4217:1987 and the fourth is the character, which separates the currency symbol from the monetary quantity.
5

currency_symbol

The local symbol used for currency.
6

mon_decimal_point

The decimal point character used for monetary values.
7

mon_thousands_sep

The thousands place grouping character used for monetary values.
8

mon_grouping

A string whose elements defines the size of the grouping of digits in monetary values. Each character represents an integer value which designates the number of digits in the current group. A value of 0 means that the previous value is to be used for the rest of the groups.
9

positive_sign

The character used for positive monetary values.
10

negative_sign

The character used for negative monetary values.
11

int_frac_digits

Number of digits to show after the decimal point in international monetary values.
12

frac_digits

Number of digits to show after the decimal point in monetary values.
13

p_cs_precedes

If equals to 1, then the currency_symbol appears before a positive monetary value. If equals to 0, then the currency_symbol appears after a positive monetary value.
14

p_sep_by_space

If equals to 1, then the currency_symbol is separated by a space from a positive monetary value. If equals to 0, then there is no space between the currency_symbol and a positive monetary value.
15

n_cs_precedes

If equals to 1, then the currency_symbol precedes a negative monetary value. If equals to 0, then the currency_symbol succeeds a negative monetary value.
16

n_sep_by_space

If equals to 1, then the currency_symbol is separated by a space from a negative monetary value. If equals to 0, then there is no space between the currency_symbol and a negative monetary value.
17

p_sign_posn

Represents the position of the positive_sign in a positive monetary value.
18

n_sign_posn

Represents the position of the negative_sign in a negative monetary value.

以下值用于p_sign_posn和n_sign_posn-

Value Description
0 Parentheses encapsulates the value and the currency_symbol.
1 The sign precedes the value and currency_symbol.
2 The sign succeeds the value and currency_symbol.
3 The sign immediately precedes the value and currency_symbol.
4 The sign immediately succeeds the value and currency_symbol.